External Validity - External Validity in Experiments

External Validity in Experiments

Many drawbacks can occur when following the experimental method. By the virtue of gaining enough control over the situation so as to randomly assign people to conditions and rule out the effects of extraneous variables, the situation can become somewhat artificial and distant from real life. There are two kinds of generalizability at issue:

  1. The extent to which we can generalize from the situation constructed by an experimenter to real-life situations (generalizability across situations), and
  2. The extent to which we can generalize from the people who participated in the experiment to people in general (generalizability across people)

Read more about this topic:  External Validity

Famous quotes containing the words external, validity and/or experiments:

    For those parents from lower-class and minority communities ... [who] have had minimal experience in negotiating dominant, external institutions or have had negative and hostile contact with social service agencies, their initial approaches to the school are often overwhelming and difficult. Not only does the school feel like an alien environment with incomprehensible norms and structures, but the families often do not feel entitled to make demands or force disagreements.
    Sara Lawrence Lightfoot (20th century)

    Once one is caught up into the material world not one person in ten thousand finds the time to form literary taste, to examine the validity of philosophic concepts for himself, or to form what, for lack of a better phrase, I might call the wise and tragic sense of life.
    F. Scott Fitzgerald (1896–1940)

    The man who invented Eskimo Pie made a million dollars, so one is told, but E.E. Cummings, whose verse has been appearing off and on for three years now, and whose experiments should not be more appalling to those interested in poetry than the experiment of surrounding ice-cream with a layer of chocolate was to those interested in soda fountains, has hardly made a dent in the doughy minds of our so-called poetry lovers.
    John Dos Passos (1896–1970)